Separated CS/CCA State Machines for Wi-Fi Wake-Up Frame Detection
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Solution Overview
Problem
Existing Wi-Fi standards lack a specified state machine for sensing wake-up frames, leading to inefficiencies in power consumption as devices transition between sleep and awake states.
Innovation Solution
Implementing physically or logically separated CS/CCA state machines for sensing wake-up and normal data frames, allowing devices to distinguish between frame types based on receiving power, thereby reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single CS/CCA state machine is used for sensing both wake-up frames and normal data frames, then the device complexity is reduced, but the measurement precision for distinguishing between frame types deteriorates
Solution Approach 1:
The patent divides the single CS/CCA state machine into two separate state machines: one dedicated to sensing wake-up frames and another for normal data frames. This segmentation allows each state machine to be optimized for its specific frame type, improving detection precision while maintaining manageable complexity through functional separation.
Solution Approach 2:
The patent applies local quality by configuring each CS/CCA state machine with specific sensing parameters tailored to its target frame type. The wake-up frame sensing machine uses parameters optimized for low-power wake-up signals, while the normal data frame machine uses parameters for standard Wi-Fi communications, thereby achieving high precision for each specific detection task.
2Use of energy by moving object
If the sending power of wake-up frame is reduced to save energy, then the energy consumption is reduced, but the receiving power level for distinguishing frame types becomes more difficult to detect
Solution Approach 1:
The patent implements preliminary action by pre-configuring the CS/CCA state machine with a predetermined power threshold specifically calibrated for wake-up frames. This threshold is established before transmission, allowing the receiver to accurately distinguish wake-up frames from normal data frames even when transmission power is reduced, by comparing received signal strength against this pre-set reference value.
Data Source
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AI summary
The present disclosure provides an area communication method and a communication apparatus for a wireless local area network, and an access point and a station. The communication method for a wireless local area network comprises: receiving a communication frame, and sensing a receiving power of the communication frame via a CS/CCA state machine, wherein a CS/CCA state machine for sensing a wake-up frame and a CS/CCA state machine for sensing a non-wake-up frame are physically separated or logically separated; and determining the type of the communication frame, according to the receiving power of the communication frame. In the technical solution of the present disclosure, a device can respectively sense a wake-up frame and a normal data frame via different CS/CCA state machines physically separated or logically separated, fulfilling the requirements of a WUR, and thereby facilitating the reduction of device energy consumption.